Felix S F Ram, John Wright, David Brocklebank, John E S White
Ram F S F, Wright J, Brocklebank D, White J E S.
Systematic review of clinical effectiveness of pressurised metered dose inhalers versus other hand held inhaler devices for delivering β2agonists bronchodilators in asthma
BMJ 2001; 323 :901
doi:10.1136/bmj.323.7318.901